Kiln.



L. P. ROSS.

KILN. `APPLIUATION FILED 00T. 31, 1'910.

Patented Sept. 26, 1911.

a SHEETS-HEBT 1 L. P. ROSS.

KILN. APPLICATION FILED 00T. 31, 1910.

Patented` Sept. 26, 1911 i 2 SHEETS-SHEET 2 F/G 7 W/T/VESSES:

WMM de. x9

llNlTll FFICE.

LEWS I. ROSS, OF STANDISH, NEW YORK, ASSIG'NOR OF ONE-HALF T0 NDRTHERNIRON COVLPANY, A CORPORATION 0F NEVI KILN.

Application tiled October 3 To all whom it may concern:

lle it known that l, llrwls l?. toss, a citizen of the United States,residing at Stand* ish, in the county ol Clinton and State of New York,have invented certain VImprovea ments in Kilns, ol which the followingis a speeilieation.

My invention relates particularly to rotary kilns tor treating tine ore.Vflue dust, cement and like materials which it is desired to nodulate orclinker by a heating and rolling operation.

The primary object ot' mv invention is to prevent the riiiging of kilnsor the undesirable adhesion to the kiln liningot the material in processof treatment.

It is also an object to ell'eet a regulated detachment. of material fromthe kiln lining so that. a lamination may remain to protect such lining'from thel crosivc action ol the. traveling material, the cutting actionot the llame and wear generally.

ln the operation olf inclined rotary kilns new in use lor modulatingtine iron hearine.' material, cenientand the like hy teediug ity throughfrom one end and subjecting it to the action of a llame.introduced atthe other end, there islgroat less in time and etlicieucy .due to theadhesion ot the. heated material to the kiln with the formation o'l' anannulus. rapidly increasing in thickness. wherehy the kiln is clicked,the travel ol' the material is obstructed, Vthe heating action is all'ected and the operation must he stopped to remove the obstruction.

rIlhe -very considerable kiln lengths required in nodulating andelinkering operations has heen a dilliculty in the way o'l find1 inglnactieahle means ilor ]n'e'vt.nting ringing, and drags which have heentried iujure the kiln linings, are expensive because the) are destroyedhy the heat to which they are subjected, and do not rnoduee satisfactoryresults. .l have succeeded in preventing this objectionable ringformation, while permitting the :formation ol' a limited protectq ingllamination upon the lining, hy thesimple means of a scraping device,sach as a railway rail, acting nnder control so that it shall rideWithin the kiln upon the desired lamination adhering to the lining andscrape therefrom the material which would otherwise huild up theobjectionalle annnlus. The scraping device is preferably supported sothat it floats, hut it may he held rigidly Specification of LettersPatent.

1, 1910. Serial No. 589,854.

atentetl Sept. 26, 1.9.11.

at one or hoth ends, and it may he protected hy ainr desired refractorymaterial or cooling means.

The elniracteristie features ofiny improvements are more specificallydisclosed in the following description and the accompanying drawings inillustration thereof. t

In the drawings, Figure l is a longitudinal sectional elevation ot' arotary kiln having my improvements applied thereto; Fig. 2 is anenlarged sectional view taken on the line E-2 ot Fig. l; Fig. 3 is anenlarged sectional view taken on the line 3MB of Fig.

l; Fig. lis a perspective view of a section ot' a scraping har havingpipes lor carrying a. cooling tluid connected therewith; Fig. is aperspective view ot a section ol' a .second form of scraping har; Fig.t3 is a perspective view o'l' a section of a third form of scraping har;Fig. i is a sectional plan representing an enlargnal view oil' the lowerend of the kiln shown in Fig. l: Fig. S is an end nelevation oit thestructure shown in Fig. 7 showing the scraping har in section and thehurner removed l `ig. ll is a longil'litlinal ser tional ele.'atim1having a second lorm 'of my improvements applied thereto; Fig. 10 is anenlarged sectional view taken on the line 10 Afl() ot Fig. t); and Fig.il is an enlarged sectional view taken on the, line 'l1-11 of ["ig. ll.

'lhe mechanism. as illustrated in the drawings, comprises the `inclinedkiln l revoluhly supported on theI rollers 2, the flue 2l connecting thehigher end of the kiln with the stack -l, the l'eed spout 5passingvtlnongh the [lue into the upper end ot the kilnpand the hood t3:l'or closing the lower el'idolf the kiln. the hood being carried hywhee'lst having a limited movement longitudinallyol?` thtl kiln onv thetrack 8 carried hy the truck t) movable on vthe track 10, A burner,coinprising the gas pipe l1 and the pnlverized `t'uel pipe l2 therein,extends through the hood and projects a llame through the lower end ofthe kiln, in the reverse direction to the movement otI the materialst'cd therethrough from the spoutl 5, the materials heing graduallyheated as they are rolled in passing through the revolvine` kiln. As thematerials approach incipient fusion and their adhesion increases, theytend to rise along the lining` ot the kiln to the line a o and from thepoint o to the point a. the adhesion is such that 1n the asu-al opera-vytion an annulus a-a rapidly forms` and chokes the kiln.

As illustrated in Figs. 1- -8, the hood 6, is

i provided with a slot 13 concentric With the kiln and a T-bar 14 ispassed therethrough into the kiln, the bar terminating inthe kiln at apoint adjacent to the. section at which the ring begins to form.: Thesupported end. of 'the baris disposed suitablyat approximately 45degrees from the bottoms of the hood and kiln, at theA side toward Whichthe revolving material` rises-'and is free toride up the side of thekiln lining approximately parallel to the axis of revolution, the barfloating and detach-ing adhering material.

But the bar'may be liked and its-Weight,

character and disposition are subject to regulation, so that initsaction a layer of the 'materialmay be left adhering to' the kilnlining for its protection or the adhering matter may be 'Wholly removedand the'kiln may be scraped throughout its length.

-The bar is movable through the hood on a roller 1-5 vjournaled thereon'and is held against longitudinal ,movement4 after' it has.

the heat to which litis subjected. But it is suitably a usual rolledmetal shape, as the T-har 14, cooled by Water conduits or pipes 18iixed'theretoand connected beyond the hood with fieXible hose 19. Theiron I-.bar 20, cooled bythe Water pipes 21, and. the' ironX-bar 22,cooled by the' 1a'ff. te.rfpipes .23,

are further examples of suitable scraping' devices.

As illustrated in FigsfQ-l-l, the bar24' extends entirely v through thekiln. form is suitable where the usual kiln'length is shortened as itmay be 'with the provision hereof for scraping down and removing theadhering materia-l; This bar is passed a refractory material 1 This"through .the slot 13 of the hood 6 and through the kiln to the bearing25 provided with the slot 26 Within which the forward end of the bar issupported and adapted .t0

move. Theb'ar is held by the slots at kthe desired distance from thelining ,ofthe kiln and so that it is permitted a limited floating.movement, While it may be held, if desired against longitudinalmovement byany suitf able means, as the platesections 16 and 16 .engagedbythe clips17. Duets .19 carry Water'through the bar, the bar beinglongi- `tudinally movable when thev plate is d emoved in practicingtached and may be so the operation.

It will be evident that 'the foregoingl apparatus may be variouslychanged to accommodate diii'erent conditions of use, as the matter ofthe lengt-h of the kiln to be scraped, the manner voi." supportin'gthescraper and thel method of cooling or protecting thef scrapingapparatus.

Having described'my invention I claim 1. The combinationof a rotarykiln, with a floating-scraping bar therein, and means for controllingthemovementot said bar.

2.A The combination of a rotary kiln, with a' oating scraping bar'therein, and means for supporting. sa'id bar so that` it is Imovable up'the side thereofI by the rotation of /said kiln. f' 3. The combinationof an inclined rotary kiln, means for introducing materials at thehigher end thereof, means for introducing a iiame at the lower endthereof, a floating' 'scraping'bar disposed Within the lower end ofsaidl kiln,.and means for loosely supporting said bar so that it shallbear against vthe revolving interior surface of said kiln above thebottoni thereof.

In Witness whereof I have hereunto set my nan-1e this 21st day. ofOctober, A. DQ

1910, in the presence of the subscribing Witnesses.

LEWIS P. ROSS.

Witnesses: D. S. LAWSON,

L. H. MOCLELLAN.

